Support arm



FIG. 1 is a perspective view of the support arm of the presentinvention;

FIG. 2 is a left side elevational view, the right side elevational beinga substantial mirror image thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a bottom plan view thereof.

FIG. 5 is a rear elevational view thereof; and,

FIG. 6 is a top plan view thereof.

The ornamental design for a support arm, as shown and described.